Safety attachment for gas-burners.



PATBNTED AUG. 9, 1904. I. G. MOULTON.

SAFETY ATTACHMENT POR GAS BURNERS.

APPLIOATION FILED DB0. 26. 1903.

N0 MODEL.

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No. '767,077'. Patented August 9,1904.

UNITED STATES` PATENT OEEICE.

IRA C. MOULTON, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOSEPH CYR, OF BOSTON, MASSACHUSETTS.

SAFETY ATTACHMENT FOR GAS-BURNERSi SPECIFICATION forming part vof Letters Patent No. 767,077, dated August 9, 1904.

Application filed December 26. 1903- Serial No. 186,532.' (No model.)

T @ZZ wwm/ i Tiwy CDTI/067%.' inwardly it will bear on the upper portion of Be itknown that'I, IRA O. MoULToN, of Bosthe valve and force the same away from its 50 ton,`in the county of Suffolk and State of Masseat, as shown in Fig. 2. Cooperating with sachusetts, have invented certain new and usethe linger c as a part of the valve-opening deful Improvements in Safety Attachments for vice is a lever a', which is pivoted at c to an Gas-Burners, of which the following is a speciear on the burner and is suitably engaged with fcation. the finger c, so that when the lever e' is swung 55 This invention relates to safety gas-burners inwardly toward the burner it will force the of the class in which provision is made for the finger e into position to open the valve. The 1o automatic closing of the passage through the lever e is preferably provided at its swinging burner when the gas is blown out or the flame end with a push-piece c3. The valve-opening extinguished without shutting off the gas, the device is locked in its operative position 60 object being to prevent a long-continued es- (shown in Fig. 2) automatically and immedicape of unconsumed gas from the burner. ately when the lever c' is swung inwardly by I5 The present invention consists in certain means of a detentf, which is pivoted at f to improvements in safety gas-burners looking' an ear on the burner and has a shoulder f2 y to simplicity of construction, eiiiciency of opformed to engage a tooth ci, aflixed to the le- 65 eration, and durability and freedom from liaver e, the arrangement being such that the bility to derangement. detent eng'ages said tooth by gravitation when 2O Of the accompanying` drawings, forming a the lever is pushed inwardly to the position part of this speciiication, Figure l represents shown in Fig. 2. Thermostatic means are a side elevation of a burner embodying my inemployed for displacing' the detentf and caus- 70 vention, the automatic valve of the burner ing it to release the valve-opening device, being shown as closed. Fig. 2 represents a thus permitting the springfl to act and force partial elevation and partial section of the the valve to its seat, and at the same time burner, showing the automatic valve open. force the valve-opening1 device outwardly, as Figs. 3 and A represent elevations from the indicated in Fig. l. The said thermostatic 75 side opposite that shown in Fig. 1. device comprises a thermostat g, which is a The same reference characters indicate the metallic bar of any metal or alloy having a same parts 1n all the iigures. suitable coelhcient of expansion and contrae In the drawings, a represents the pillar of tion, brass being' preferred, although aluminl a gas-burner, and 7) the burner-tip. The pilium or other metals may be used. ',lfhe'thcr- 8O lar has a gas duct or passage a extending mostat g is attached at one end by a screw g' through it, the said passage being formed at or otherwise to a fixed support, which is pref- 3 5 a2 with a valve-seat, preferably of tapering erably an arm a3, formed on or aliixed to the form. burner-pillar c. The opposite end portion of c represents a valve adapted to automaticthe thermostat g is free to move endwise by ally close the seat a and stop the flow of gas expansion and contraction and is engaged at through the burner. The said valve is pref g2 with an arm /1/ formed on a lever it, which 40 erably spherical, as shown in Figs. l and 2, is pivoted at 71,2 to the burner.

and it is preferably closed or seated by means yrepresents another lever, which is pivoted of a spring d. I employ a valve-opening deat e" to the burner and is engaged with the 9G vice which is adapted to be operated from the lever it by means of gear-teeth jj, formed onoutside of the burner, the said device comthe leversf and t, as shown in Fig. 3. To prising a slide or finger e, which is movable ,the outer end of the lever t' is pivoteol at l' a in an orilice in one side of the burner, its indog 71;, having' a hook or shoulder 7a2, which is ner end being preferably inclined and aradapted to engage a pin f, ailixed to the deranged so that when the said linger is pressed tent j', the arrangement being such that the sfo dog c automatically engages the pin f3 by gravitation when the lever fr' is swung downwardly from the position shown in Fig. 3, which is the position that said arm occupies when the thermostat g is cold and contracted.

Then the burner is lighted, the thermostat g is heated and expands suficiently to depress the arm @i and dog in, causing the dog to engage the pin f 3 ot' the detent, as shown in Fig. 4c, which shows the position of the several parts when the burner is lighted. In case the iiame of the burner becomes extinguished by accident or by being blown out the thermostat will at once begin to contract and impart an upward movement to the arm z' through the described connecting means, thus causing the dog fr to raise the detent f out of engagement with the tooth e* of the valve-opening device. The said valve-opening device is thus released and the valve is closed and forces the valveopening device outwardly, as indicated in Fig. l. The gas is thus shut otf before a suiiicient quantity has escaped to do any material damage. Before the burner is again lighted the valve-opening device is pressed inwardly by hand and immediately locked by the detent to open the valve. When this operation is performed, the thermostat being cold, the dog if: is out of engagement with the pin f3 of the detent, as shown in Fig. 3. The dog is held in'this position by the cooperation of a pin or stud @o on the lever e with an incline if on the dog k, the relative arrangement of said pin and incline being such that when the arm c' is swung downwardly by the expansion of the thermostat the dog 7c will be permitted to swing inwardly, so that its hook X62 will swing under the pin k3 and engage the latter, the device being thus set or prepared for its next automatic action.

It will be seen that the spring d not only closes the valve, but furnishes the power which forces the valve-opening device outwardly. The outward movement of the valveopening device causes the pin e5 on the lever e to bear against the dog and force the latvter outwardly, so that when the lever z' is moved downwardly the dog will move downwardly without engagement with the detentpin f 3 until the dog reaches the position shown in Fig. 4, when it will swing inwardly and engage the detent-pin, as above described.

Owing to the automatic and immediate holding of the valve-displacing device in its operative position by means of the detent f, as soon as the lever e is swung inwardly, as hereinbetore described, the entire device is independent of the thermostat when the gas is to be lighted. In other words, the operator can leave the burner as soon as the gas has been ignited without waiting for any action of the thermostat.

I do not limit myself to the details of mechanism here described and shown, as the same may be modified in various particulars without departing from the spirit of my invention.

l claiml. A gas-burner having a valve which automatically closes the gas-passage in the burner, a valve-displacing device, a detent adapted to hold said device in its operative position, a thermostat exposed to heat from the burner, and means operated by the contraction of the thermostat for displacing said detent and permitting the valve to close, the construction being such as to enable the detent to hold the valve-displacing device in its operative position, independently of the action of the thermostat.

2. A gas-burner having a valve adapted to automatically close the gas-passage in the burner, a valve displacing or opening device, a detent adapted to hold said device in its operative position, a thermostat exposed to heat from the burner, an oscillatory arm having a dog adapted to engage the detent, and connections between the said arm and the thermostat, for moving the arm in one direction to engage the dog with the detent when the thermostat is expanding, and for moving the arm in the opposite direction to cause the dog to displace the detent when the thermostat is contracting.

3. A gas-burner having a valve adapted to automatically close the gas passage in the burner, a valve displacing or opening device comprising a lever pivoted outside the burner, and a valve-engaging finger engaged with said lever and movable in an orifice in the burner, said lever having a tooth or stud, a pivoted detent adapted to automatically engage said tooth and provided with a pin, an oscillatory arm having a dog adapted to engage the detent-pin, and thermostatic means for moving said arm in one direction to cause the dog to engage the detent-pin, and in the opposite direction to cause the dog to displace the detent, the said dog and lever having complemental meansfor disengaging the dog from the detent-pin after the displacement of the detent, whereby the detent is left free to again engage the tooth of the lever.

4. A gas-burner having a valve which automatically closes the gas-passage in the burner, a valve-displacing device, a detent adapted to hold said device in its operative position, a thermostat exposed to heat from the burner, and composed of a bar secured at one end to a fixed support, its other end being movable, and mechanism for communicating motion from the movable "end of the thermostat to the detent, said mechanism comprising two pivoted levers, one having an arm engaged with the movable end of the thermostat, while the other has a dog adapted to engage the detent, said levers having intermeshing gearteeth.

5. A gas-burner having a spring-closedA IOO IIO

valve, a valve displacing or opening device comprising a sliding linger and a pivoted lever engaged therewith, and a detent adapted to automatically engage said lever and hold the valve open, as soon as the said lever is actuated by the operator.

6.` A gas -burner having a springclosed valve, a valve displacing or opening device comprising a sliding tinger Iand a pivoted lever engaged therewith, a detent adapted to automatically engage said lever and hold the valve open, a thermostat exposed to heat from the burner, and operating connections between said thermostat and the detent, means being' provided for enabling the detent to hold the valve-displacing device in its operative position independently of the action of the thermostat.

7. A gasburner having a spring-closed valve, a valve displacing' or opening device comprising asliding linger and a pivoted lever engaged therewith, a detent adapted to engage said lever and hold the valve open, a thermostat exposed to heat from the burner, and operating connections between said thermostat and the detent, said connections including a detentengaging dog adapted to automatica] ly engage and release the detent, the construction being such as to enable the detent to hold the valvedisplacing device in its operative position7 independently of the action of the thermostat.

In testimony whereof I have affixed my signature in presence oi' two Witnesses.

IRA C. MOULTON.

Witnesses:

C. F. BROWN, JOSEPH CYR. 

